I am trying to complete/fine tune my collection of Marvel's Son of Satan/Satana books, and while reading/re-browsing the stories and the context, I realized there are many great tie-ins between the character and many Marvel age titles, especially within the exciting context of all the then-new "horror" titles which partly stemmed from the "zeitgeist" and craze with a certain kind of horror at the time. And I realized that equally important characters which i have always found very relevant (Morbius, Werewolf by Night, Dracula, etc.) offer many stories which give a broader sense of the readers' sensibility and experience at the time.
So I was looking for an aid from board friends: which single Marvel Age *single stories* from the period, especially the horror-related ones, would you consider truly essential, i.e. "I couldn’t do without that one!”, or “this will remain in my collection forever”. By Marvel age stories I mean only these falling within the conception of the continuity as originally set by Stan Lee.
Your suggestion/appreciations will be much valued! Don’t be shy…
P.S. Thanks to @jools&jim for fine-tuning the thread title.

Wows...some of Doc Joes Goodies are up for sale in the current ComicLink Auction
Sometimes I see a book and I cant believe I send it in but I did...my loss
This Fear book is amazing, square bound, only 9.8, feeling stupid for letting it go...
Fear 3 cgc 9.8 - Single Highest Graded

Deadpool 45 1:50, Howard The Duck 2 1:50 Run the Jewels Lot
(this is my first FS post, so please let me know if I did not follow any rules)
This lot contains 5 books.
1) Deadpool's Secret Wars Run the Jewels variant, CGC 9.8
2) Deadpool 45 1:50 Run the Jewels Variant, CGC 9.6
3) Howard the Duck 2 1:50 Run the Jewels Variant, CGC 9.8
4) A sketch variant of Howard the Duck 2 Run the Jewels Variant
5) Black Panther 2 Run the Jewels Variant
Number 2 and 3 are extremely rare and hard to find.
I'm looking for $899 or best offer!